Mold



May 31, 1932. 4 E, PERRAULT 1,860,429

MOLD

Filed May 5, 1929 2 Sheets-Sheet l Fig.2. Jose IZ/EPeY'WQz/Lc/Z/(Q May 31, 1932. J. E. PERRAULT MOLD Filed May 3, 1929 2 Sheets-$hee 2 UNITEDSTA I CQBPORATION-OF DELAWARE.

a mold in which a temporarily plastic ma- Patented May 31, 1932 .rosEPH PERRAULT, or WATERTOWN; MAss'AcnusE'rtrs, Assrenon, BY MEsNnAs- YSIGNMEN'IS, 'ro'noon RUBBER, COMPANY, me, or WILMINGTON, DELAWARE, A,

MOLD V Application filed May 3, 1929.. Serial ama;

i This invention relates to a mold and particularly to a type of mold for forming electric storage battery'casings from plastic material, such as rubber and the like.

The object of the invention is to provide terial' may'be molded into articles, of various forms accordingto theshape of the forming plates employed, said mold being adapted Itobeassociated with a hydraulic presslof well'known' construction and the side plates of the mold being so constructed that they may be easily and quickly opened and closed and effectively locked together when they arelocated in their closed positions xzj I r The invention consists in' a mold. for forming articles from plastic material as set forth in the following specification and particularly as pointed out in the claims thereof.

Referring to the drawings:

Figurel represents an vend view of a mold embodying'my invention, said mold :being illustrated in its closed and lockedposition.

Fig; 2 represents a side elevation of the mold in its closed and locked position.

Fig. 3 is a plan viewof the mold in its closed and locked position.

Fig. 4 isa central vertical section taken T on the line 4-4'of Fig. 1.

Like numerals refer to like parts throughout the several views of the drawings.

In the drawings, 5 represents a bottom.

plate consisting of a base 6 and a raised portion17 which is preferably formed integral with said base. Pivotally mounted'upon opposite sides of'the bottom plate 5 are side plates 8, each of which is provided with a plurality of ears 9 vwhichare insertable between ears 10 which project laterally from the sides of the raised portion 7 of the bottom plate. A rod 11 projects through all of the ears 9 and 10, being rigidly secured in any suitable manner to certain of the ears 9 of the side plate, thereby forming a pivot for the side plate and being adapted to rock in unison therewith. An arm 12 is rigidly secured to each rod llat one end thereofand a counterweight 13 is suspended from the outer extremity of each' arm 12.

The oppositesideplates 8 are preferably duplicates of each other and an inner face 14L- of each plate is formed with any suitable design thereonito produce the outer face of the article with which said plate contacts,

but: it. is evident that the actual designupon TENT; ounce the'inner face ilc may vary somewhat upon the two side plates without departing from the spirit of this invention.

Ontheir outer surfaces each side plate 8' is, providedwith bevelled surfaces 15 and preferably there is a, bevelledrsurface .15

located upon both side edges of each sideplate. 7 l

Pivotally mountedupon the other sides of the bottomplate 5 from that upon which the side plates 8 are mounted are other side plates 1'6, each of whichhas a plurality of ears 17 formed. integral therewith and projecting fromthe lower edge thereof between a'plurality of ears 18 which project laterally from the raisedv portion 7 of the bottom plate. A rod 19' extends through the ears 5 17 and '18 and thereby forms a pivot for each side plate 16. The side plates) 16 are preferably duplicates ofeaohother and each of-said plates has an:inner fac'eQOformed withany suit-' able design thereon toproduoe the outer'face ofthe article with which'said plate contacts,

and it is; evident that the actual design upon the innerfacexfZO, mayvary somewhat upon the two side plates without departing from the spirit of'this-invention. Eachsid-e plate "16 has aipair of ears 21 formed integralztherewithuponthe inner sure face thereof, and-each ear 21 has a bevelled surfaceg22 which; is adapted to engage the bevelled surface 15 located 11POI11' the adjacent edge of theside plates 8,:when all of the-saidside {plates arefmo'ved to their closedpositiom as-illustratd in Fig. 3, and

the bevelled surfaces :15 and22-co-operate to position the side: plates relatively to each other when'said side plates ziremoved to theiIi-closedpositions. r 'Ri'gidly secured to: theiouter face of each of the sideplates 8is alocking bar 23, at the opposite ends of which are laterally project: ing portions 24, the inner opposite faces'of' which are bevelled aft-'25. The locking'bars 23 are duplicates of each other, but upon one of the bars the projecting portions 24 point downwardly, while upon the other bar the projections 24 point upwardly, and fura. thermore, the locking bar 23 with the downwardly pointing ;projections:24 is positioned higher upon-the side'plate to which it is attached than is the locking bar that is provided with theupwardly projecting portions 24, see Fig. 1.

Secured tothe outer face'of'each side' plate 16 is a bracket 26 in which a pivotal pin 27 is mounted. A member 28 is mounted upon the opposite end portions-ofthepin27 and said member is, in turn, rigidly secured to the under sunface ofa'locliing:ann:29,.each of whichis provided withitwobevelled edge portionsBO which are adaptedto-engagethe-bevellcdportions ofthe lockingbars 23. Each locking- 11111129 is so positioned 'withnrespect to both of .thefilocking bars 23 that when .it is .nocked into interlocking engagement with I said locking bars,1thatthe upper edge "portion of each bar will enga'gethe :under' edge portion of the docking :bar' that has =downwardl-y projecting'portions fi l, while the under edge portion-of the lockingarm will engage the upper edgeo'fithe locking bar that is provided with the upwardly projecting portions 24. As :the locking'*arn1s 29."are rocked into-eng'agem'ent'with the loeking bars 23, the bevelledsurfaces30 and25 of the looking arms and locking bars respectively will contact with each other with the result that the 'side plates 16 will be forced into engagement with the side'plates' 8, and all of said side plates will' be locked tightly together in theirclosedpositions.

The "general operation of Y the mold hereinbefoie specifically described is 'as "follows Assumingthat the various side plates are all located in-their open positions and it is desireiito I close 1 said plates, the two side plates 8 arefir'st roked'into a verticalpositionupon their respective pivots '11 and'when in said verticzil' positions, a portion" o'fthe inner face (if said plates will-contact-with an edge portion of the bottom plate "5 as illustrated in Fig. "1. The side plates'8 areeasily rocked into their closedgposit'ion' and will remain in this position by reason o'fthe fact that they am counterbalanced by means of thecounterweights13.

' f The side plates ifiare'then closed by grasphug the end portions of' the locking arms .29 and rocking said side plates 16 upon their pivots 19 until the bevelled surfaces 22 of the :side plates :16 engage "the bevelled surfaces "15 of -the sideiplates 8. The locking arms 29 are then rockeduponitheir pivots 2! amid the :bevelled' edge portions "80 .of the locking iarms rare forced into engagement withath'e bevelled surfaces 250f "the locking barszr23, the action of these :last nam'e'd bevelled as they engage 5 each other is to still further force the co-operating bevelled surfaces 15 and 22 of the side plates 8 and 16 respectively into engagement with each other. After the plastic material of which the article to be molded is composed hasbeen inserted into the'cavitybetween the side -plates,the press with which the mold is associated is operated in a well known manner to force amandril of well known form,-

not'. shown in the drawings, into the cavity of the mold,..thereby forming the article in a .manner well known to those skilled in the movement parallel thereto, each lockingbar being adapted to engage both side plates and draw theplates together by asingle rotative movement.

' 2. Apparatus for molding plastic material as defined in claim 1 in which each locking bar extends beyond the mold structure to provide 7 a manually operable lever.

In ftestimony whereof I have hereunto set myhand.

JOSEPH E. PERRA ULT. 

